Grinding-mill



(No ModeL) 2 Sheets--Sheet 1.

A. s. TRAGETHON. GRINDING MILL. No. 486,003. Patented Nov. 8, 1892.

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GRINDING MILL.

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UNITED STATES PATENT OFFICE.

ARNE S. TRAGETHON, OF KENSETT, IOWA.

GRINDING-MILL.

SPECIFICATION forming part of Letters Patent No. 486,003, dated November 8, 1892. Application filed April 23, 1892. Serial No. 430,365- (No model.)

To all whom zit/may concern.-

Be it known that I, ARNE S. TRAGETHON, a citizen of the United States, residing at Kensett, in the county of Worth and State of Iowa, have invented a new and useful Grinding-Mill of which the following is a specification.

This invention relates to grinding-mills; and it has for its object to provide an improved grinder adapted to be used for grinding various kinds of grain, as desired; but the principal aim of this invention is to pro- Vide an improved grinder having a rapid motion and :avoiding the many disadvantages and drawbacks to the ordinary grinders now in the market, which grind very slowly where they are driven by windmill-power.

In the present invention the grinder described is connected with and driven by the ordinary windmill, but is so constructed as to make a number of revolutions to every stroke of the windmill rod or shaft, and will not only grind easily, but as rapidly as a geared mill.

With these and many other objects in view, which will readily appear as the nature of the invention is better understood, the same consists in the novel construction, combination, and arrangement of parts hereinafter more fully described, illustrated, and claimed.

In the accompanying drawings, Figure 1 is a plan view of a grinding-mill constructed in accordance with the present invention and connected with a windmill-powe'r-transmitting device. Fig. 2 is a vertical transverse sectional view of the grinding-mill and 1ongitudinally of a portion of the frame. Fig. 3 is a vertical longitudinal sectional view of the grinder. Fig. 4 is a detail perspective of one of the grinding-disks. Fig. 5 is a detail sectional view of the balance-wheel ratchet devices.

Referring to the accompanying drawings, A A represent opposite vertical frames supporting the horizontal frame-pieces B, which support the driving devices to be presently described. Secured to one of said vertical frames A and beneath the parallel and horizontal frame-pieces B is the grinding-mill frame G. The said frame 0 is supported upon the end frame-pieces C, and is provided with the opposite upwardly-extending end brackets D and the intermediate or central upright frame-piece or bracket D, resting upon the sills of the frame 0 and suitably braced by the braces D Secured to one side of the central upright frame-piece or bracket D is the inclosed hopper-box E, open at its upper end to receive the grain and provided near its lower end with a lateral escape-opening e, through which the grain passes or is fed to the grinding devices adjacent to the hopper. The main shaft F passes through the escapeopening e in said hopper and is journaled in the end and intermediate brackets D and D, respectively. Fixedly mounted upon the shaft within the lower end of the hopper-box E is the spiral feeding-auger G, which auger also projects into the escape-opening e in the side of the hopper-box and carries the grain in between the grinding-disks H and H, respectively. The said grinding-disk H is stationary and is fixedly secured to the outside of the hopper and around the escape-opening therein. The said disk is provided with a central beveled or concaved portion I, having a series of grinding corrugations 2' therearound, and also with the fiat corrugated grinding-face J between said concaved grinding portion and the rim of the disk. The opposing grinding disk H is similarly constructed and corrugated to the stationary grinding-disk just described, but is adapted to slide upon and be carried by the revolving grinding-shaft F. The said grinding-disk H is provided in the hub thereof with the recesses K, which, when the said disk is held against the grinding-face of the stationary disk, receive the lugs 70, projecting from the shaft F, so that the said movable grinding-disk H is held securely by said shaft and carried around thereby; but it will be observed that the said recesses are sufficiently deep to allow the said disk to slide sufficiently upon the shaft away from the stationary disk to allow stones or other hard foreign substances to pass out between the disks without injuring the same.

The revolving grinding-disk H is held in contabt with the stationary grinding-disk by means of the spring-pressed lever J. The said lever J is pivoted at one end to the 0dstanding arm K, secured to the intermediate bracket D, and is provided with alongitudially-disposed slot L, working over the shaft F and embracing the oifstanding rod M. The said rod M receives at its outer threaded end against the revolving disk. It will now be readily seen that as the shaft F is driven the grain in the hopper will be fed therefrom in between the grinding-disks H and H and will be ground thereby as fine as necessary, according to the depth of corrugations therein, and drops from said disks to any suitable receptable thereunder. The spring-pressed lever, forcing the revolving disk against the stationary disk, will readily give to any hard foreign substance which finds its way between the disks and allow the said matter to force itself from between the disksand not injure any of the parts of the grinder.

On one end of the drive-shaft F is secured a small pinionf, which is driven by the combined chain and gear wheel P, carried upon one end of the counter-shaft p, journaled in one of said ends and the intermediate bracket. The said chain and gear wheel is provided with an inner toothed periphery p, which meshes, as stated,with said pinion f, and thereby communicates motion to the main grinding-shaft F. The said counter-shaft 19 also carries a small chain or other pulley g, which serves to assist in driving the counter-shaft, as

receives the chain or belt g, which is driven by the drive-wheel q" of the power-transmitting device R, preferably of the construction described and claimed by me in a contemporaneous application, Serial No. 428,157. J ournale'd in suitable hearings on the horizontal and parallel frame-pieces B isa supplemental drive-shaft S, carrying upon one end thereof the largeheavybalance-wheel s,andwithin the frame a small chain or other pulley s, corresponding in size to the pulley upon the coun ter-shaft p, and also receiving the chain q, passing over said counter-shaft pulley, so that the said chain drives both shafts at the same rate of speed. The said chain q is held sufliciently tight upon the small pulleys by means of the belt-tightening pulley T. The said pulley T is carried upon the lower end of the slotted arm 25, adjustably secured to one of the horizontal frame-pieces B at a suitable point of attachment. Secured to one side of the balance-wheel 8, upon one end of the supplemental shaft, is the chain-wheel U, which receives the chain belt a, passing thereover, and the combined gear and chain wheel P upon one end of the counter-shaft p. It will thus be readily seen that from the same drivewheel motion is communicated to the counter-shaft from two entirely-separate belts, which therefore serve to evenly distribute the power and cause a rapid revolution to be given to the main grinding-shaft carrying the grinding devices. It will be apparent that after the apparatus has become started and the heavy balance-wheel put into a steady motion the momentum of said wheel, independent of the motion it must receive from the belbcontact q,will be transmitted through the belt u to the wheel P, and therefore materially assist the turning of said wheel and take therefrom a portion of the strain arising from the friction of the pinion f with the teeth 19. A belt-tightener T, similar to the tightener T, is also adjustably secured to one of said horizontal frame-pieces at a suit able point of attachment and presses and bears upon the chain belt a to hold the same sufficiently tight upon its wheel or pulley. Loosely mounted upon the opposite end of the drive-shaft F is the grinding balancewheel V, provided with a ring ratchet-disk 1; upon one face thereof. The ratchet-disk w is engaged by the spring-actuated pawl W, carried by the fixed pawl-plate 10, carried by the shaft F, and said pawl is designed to work within the ratchet-disk and engage the teeth thereof while the said shaft is in motion. In case the shaft F suddenly stops it will be readily seen that the weighted balance-wheel continues to revolve of its own accord upon the shaft and over the spring-actuated pawl, thereby preventing any undue strain upon any part of the grinder.

It is thought that the construction and many advantages of the herein described 7 grinder are apparent without further descripwell as the larger chain and gear wheel P, and 1 tion.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, is

1. In a grinding-mill, the combination, with the frame, the hopper, and stationary grinding-disk, of the grinding-shaft, a revolving grinding-disk mounted to slide upon said shaft, a sliding sleeve mounted on the said shaft alongside of said revolving disk, an offstanding arm secured to said frame,athreaded rod located opposite said arm, a longitudinallyslotted lever pivoted at one end to said offstanding arm and working over the shaft and said threaded rod, a stop-nut engaging said threaded rod, and a spring interposed between said stop-nut and the lever to force said sliding sleeve against said revolving disk, substantially as set forth.

2. In a device of the class described, the combination, with the main grinding-shaft, of a balance-wheel loosely mounted upon one end of said shaft and provided with an interiorly-toothed ratchet-ring, an adjacent pawlplate fixedly secured to said shaft, and a spring-actuated pawl pivoted to said plate and working within said ratchet-ring and engaging the teeth thereof, substantially as set forth.

3. In a device of the class described, the combination, with the frame, of the main shaft carrying a small pinion at one end thereof, a counter -shaft journaled in said frame above said main shaft, a combined chain and gear wheel mounted upon one end of said counter-shaft and provided with an inner cogged periphery meshing with said pinion, a small Wheel or pulley mounted upon said counter-shaft, and independent chain belts passing over said combined chain and gear wheel and said smaller wheel or pulley, substantially as set forth.

4. In a device of the class described, the combination, with the frame, of the main shaft carryinga pinion at one end, a countershaft journaled in said frame above said main shaft, a combined chain and gear wheel mounted upon one end of said counter-shaft and meshing with said pinion, a smaller chain wheel or pulley mounted upon said countershaft, a supplemental drive-shaft located adjacent to said frame and carrying a small 

